Jan 06 2009
Portfolio Risk: Give Proper Consideration
With the December statements available, I am updating the various portfolios I track and report on over on the Premium Content side of this blog. For those portfolios where I have data older than three years I can account for risk, a measurement that is too often ignored by investors. The Thomas/Lalla/Herr spreadsheet, used to calculate portfolio performance and compare it with a total stock market index, does not have the ability to calculate risk. To come up with the risk factor, I maintain records using another software program. For a few portfolios, I have detailed records going back into the 19990s, and one thing I observe is that I have been able to reduce portfolio risk from the 25% level to the 15% range by moving from individual stocks to index funds. That is not a trivial decrease.
Many investors continue to populate their portfolios with individual stocks or managed mutual funds. Big mistake. Why invest in managed mutual funds when only 30% will outperform an index fund in a given year, and the following year that 30% will be a different group of managers? One big reason is advertising. The gullible public will follow CNBC recommendations rather than dig through research papers at their local university. The popular press runs on advertising and it is not profitable to push index investing.
One of my favorite portfolio monitoring ratios is the Information Ratio. I actually use the alternative of Alpha divided by Sigma, where the Sigma I use does not penalize volatility to the upside as we want a portfolio to move up. Therefore, the standard deviation to the upside should not be a negative factor.
As I have been updating the seven portfolios, thus far all have positive Information Ratios. This means the portfolio is performing better than the benchmark. The higher the ratio the better. When I see a ratio in excess of 0.5, I am very pleased. On occasion, I have had a portfolio show up with a ratio greater than one. That is exceptional.
When monitoring your portfolio, find some way to measure risk, the metric frequently neglected. Also, know how well your portfolio is performing with respect to a benchmark. The T/L/H spreadsheet does an excellent job of this, although it does take some work to learn how to use the Excel SS.
Lowell Herr
Photograph: January 4th snow
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